Saw-swage.



. No. 879,352 Y PATENTED FEB. 18, 1908.

E. P. ARMSTRONG.

SAW SWAGE.

APPLICATION FILED JULY 18, 1904.

EDWARD PICKERING ARMSTRONG, OF PORTLAND, OREGON. A

SAW-SWAGE.

Specicaton of etters Patent.

Patented Feb. 18, 1908.

Application iiled July 18. 1904. Serial No. 217.146.

To all whom it may concern:

Be it known that 1, EDWARD PICKERING ARMSTRONG, a citizen of the United States, residing at Portland, in the county of Multnomah and State of Oregon, have invented a new and useful Saw-Swage, of which the following is the specification.

My invention relates to improvements in saw-swages in which a 'lined anvil is held against one side of the saw tooth and a rotatory eccentric swaging die acts on the opposite side of the tooth, the movements of said eccentric die causing the space between it and the said anvil to close up or open out, the anvil being placed on its side of the tooth and slipped back until the tooth rests against said die while standing open.

The swage is clamped against the saw by setting up clamping screws on the opposite sides of the saw. Upon rotating the swaging die pressure is brought to bear against the saw tooth forcing it against the opposing anvil and thus spreading or widening out the tooth point. And the object of my invention is, first, to provide a saw-swage better adapted to its use than heretofore, by supplying it with a means permitting the removal of the eccentric die from its working hole in the swage block or body at will, and replacing it again to working position, and securely locking it there without the use of tools or removing any of its parts. Second, to provide a means for locking the adjustable clamp screw without the use of a check nut, thus enabling the clamp screw to be placed closer to the eccentric die, making it clamp the saw toothnearer the point being swaged, and reducing the liability of it being bent sidewise while being swaged. Third, to provide an eccentric die shaped for a portion of its length at one end to adapt it to be securedto the operating handle, and permit of a long range of adjustment endwise, and shaped the balance of its length to an eccentric form and adapted to be removed from and replaced in its working hole without interfering with the anvil, although said anvil may be projecting into the working hole of said die, as it must when in use. Fourth, to provide an operating handle for the eccentric die that is bent or curved to bring the hand hold part directly over and in line with the saw to be swaged, whereby the pressure applied to said handle by `the operator in swaging the saw, is exerted-in` the vertical plane of the saw and thereby danger of bending the teeth by side strain which frequently occurs with a straight handle, is avoided. Fifth, to provide a rider or guide adapted to rest on top of the saw teeth in advance of the swage to hold it in the position desired on the saw, said rider or guide having fianges on its side to project down past the points of the saw teeth on both sides, to prevent said rider orguide from slipping ofll the teeth when the swage is being moved from one tooth to another. I attain these objects by the mechanism illustrated in the accompanying drawing, in which similar letters refer to similar parts throughout the several views.

Figure l is a section of the swage and saw on line 3,-4, in Fig. 2 looking from the right. Fig. 2 is a side view of the swage in position on saw B. Fig. 3 is a section of rider or guide C on dotted line 5,-6, of Fig. 2 looking from the left. Fig. 4 is aside view of the swage with the guide arm N removed, showing handle J and stop H in position for use with the die lock-F in working position behind the locking clasp D. Fig. 5 illustrates the stop H and its base l, in position in block A, block A being shown in section on dotted lines 7,-8 in Fig. 4 looking from the right. Fig. 6 illustrates a tapered bush or sleeve and binding nut, which forms the grip to secure die E, and handle J, together, also having locking flange F formed upon it to engage locking clasp D, (see Fig. l). Fig. 7 illustrates the die E showing its shape, the eccentric working part being shown by section 9 and the part to receive the operating handle being shown in section 10. Figs. 7a and 7b are transverse sectional views of the die showing its shape at different points in its length. Fig. 8 illustrates the anvil P in position on the back of saw tooth B, said tooth having just been swaged against anvil P by die E, this view being further understood by referring to Fig. 1, and noting the relative position of saw B, die E and anvil P. Fig. 8 being a view of these looking from the left. Fig. 9 illustrates a saw tooth point after being swaged, if viewed from the left in Fig. 8.

In the drawings, A represents the swage block or main portion of the device whereon the other operating parts are mounted.

P is the anvil capable of vertical adjustment and heldin lace by screws R and S (see Fig. 1).f---- -fl ,f--h/L-and3K are the swage clamping screws threaded into the block A and adapted to engage the surfaces of' the saw. A guide arm N is secured to the block A by a screw Y, and a riderC is secured-to' the arm N by any suitable means, as screw X. A regulating stop H is held in place on the block A by screw V and is adapted to be set at any desired point to regulate the throw of handle J for the purpose of controlling the movement of the die E and causing it to swage light or heavy. A locking clasp D is secured to the block Alby screw U. It is desirable in a tool of this kind to provide means for the removal ofthe die E from its working position without the necessity of changing any of the adjustments of the swage and to provide means forlocking the die in its working position to prevent itfrom sliding endwise out ofplace when the tool is in use. Itis also desirable to make this change from a lockedto an unlocked position and vice versa, without detaching any of thev parts. of the swage except of course, the releasing ofthe die E and its operating handle J from the block A. I accomplish this by turning' the stop H to the rightv'then turningI the handle J in the same direction until the flange F is disengaged from the clasp D. rIhe die E can then be readily removed by withdrawing it from its bearings. serted in its working position. When the die has been returned to its working position the stop H is reset to limit the movement of the operating handle J.

As shown in Fig. 5, I prefer to mount the stop, H in` a stud I that its into a socket in the swage block and is locked therein by the screw Vf. By loosening the screw the stud and stop may be adjusted to vary the stroke o'f-the operating handle orthe stop may be swung around out of the path of the handle without moving the stud.

In Fig. 6 I have illustrated av tapering bushing or sleeve F having a segmental iiange F and a binding nut T, by means of which the handle J is secured on the die E at any point desired. The die is also capable ofjadjustnient in the handle securing means j to adapt it for use on different kinds of saws,

one position being suitable for band saws, anotherfor gangA saws and still another for circular saws, the difference in adjustment for the latter beingabout 8O degrees. The longbearing surface is provided on the die so that it can be moved lengthwise and a new surface presented as the die wears, and the handle by means of the bushing and lock nut can be readjusted on the die to adapt it for the different adjustments of the die with respect to the teeth to be swaged. In detail this characteristic of the tool is obtained by means of the tapering bushing F and lock nut, `T coperating with the tapering hole in the hub of handle J. By loosening the nut T the handle` maybe turnedon the bushing and adjusted at any desired point and at the In the same-manner it can be in-V same time the bushing will be loosened on the die to permit it to be moved lengthwise to present any portion of its working surface to the saw teeth.

In Fig. 7 I have shown the die E and in Figs. 7a and?b the variation in its surface at dii'lerent points in its length. If the die were made throughout its length, of the shape shown in Fig. 7'a the operating handle would left but would be less effective in rotating it toward the right. To overcome this objection I prefer to form the die E. at one end as shown in Fig. 7 b and thereby give handle J equal efficiency inrotating. the die in either direction. In swaging a saw the die E sometimes sticks or jams very tightly at the finish of its working stroke, thereby requiring al most as much power to return the die to its.

tant to provide an operating handle bearing on the die which will render the handle as effective on the return stroke as on the forward stroke.

In Fig. 3 I have illustrated a section of the rider C having depending flanges I/V, W, on each side to prevent the rider from slipping oii" the saw B when the swage is released by the clamping screws and is being moved ahead to the neXt tooth to be swaged.

In a tool of this kind it is desirable to have the clamping screws to engage the saw teeth to be swaged, as near the point of the tooth as possible to prevent it from being bent sidewise when swaged. To accomplish this I provide a fiat bearing surface on the clamping screw K in position to be engagedr by a set screw Il, thereby doing awayv with the usual lock. nut employed for this purpose.

The operation of the device is as follows l/Vhen the swage is in the position shown in Fig. 2. the saw blade B projects into thevrider C in the lower side of block A (see Fig. l)

and the point of the tooth; to be swaged is block A is held in place withrespect to the back of the saw teeth-by the guide lhwhich rests upon the teethvin advance of the block. The tool is then clampedon the saw by the screws M and K and clamping handle O. The die is now in such aposition that its eccentricsurface will come in contact with the under side of the saw tooth while the anvil P is held against the top of the tooth. The operator taking holdA of the handle J will give it about one-eighth of a turn to the left (see Fig. 4) and turn the die E so that. its eccenf tric surface. will act on the point of the saw tooth and swage the same, the back of the tooth being pressed against the lower end of anvil l?. As soon as this has been done the operator will return the handle J to its normal position against the regulating stop and release the clamping screws from engagement with. the saw. The swage is then moved have ample power to rotate the die to the starting point, and consequently it is imporplaced between. anvil P and die E. The i' ahead or to the lett the distance between two teeth so that the neXt tooth ahead will pass into the space between the die E and anvil P as before. The swage is again clamped and the operation described repeated.

I am aware that prior to my invention saw-swaging devices have been made with rotary reciprocating dies in conjunction with an anvil. I do not, therefore, claim such a combination broadly. But

/Vhat I do claim as my invention, and desire to secure by Letters Patent, is

l. A saw swage comprising a block A, having a recess Z and a die E mounted in said block and adjustable lengthwise therein, a

bushing divided longitudinally into sections l and adapted to lit on one end of said die E, said bushing having a tapered surface, an operating handle J having a socket to receive the tapered surface of said bushing, and means for securing said handle on said bushing, and whereby said handle has a rotary adjustment on said bushing to adapt the tool lor use on dili'erent kinds of saws.

2. A saw swage comprising a block A having a recess Z and a die E mounted in said block, a bushing divided longitudinally into sections and adapted to lit on'one end of said die E, and said bushing having a tapered outer surface at one end, an Operating handle J having a correspondingly shaped socket to receive the tapered end of said bushing and said bushing having a threaded end projectinoI through the socket in said handle and provided with a binding nut T, whereby the said bushing, the handle and said die E may all be secured firmly together.

3. A saw swage comprising a block Al having recess Z and an eccentric die E mounted in said block and a die locking device comprising a segmental clasp D mounted on said block, a bushing F mounted on said die and having a segmental flange F to engage said clasp, said locking device being released by rotating the die E a part of a revolution beyond its normal working position.

4. A saw swage comprising a block A having a clamping screw K iitting within a threaded socket in said block, a portion of the threads of said screw intermediate to its ends being cut away forming an annular recess or groove extending around the screw, and a locking screw L mounted in said block A and adapted to engage the said screw K in said annular recess and said recess being of sutlicient width to allow the adjustment of said clamping screw toward or from the tooth to be swaged.

EDWARD PICKERING ARMSTRONG.

Witnesses to signature:

M. F. CULVER, P. P. WooDYARD. 

